Kiniksa CSO exercises 2,726 RSUs, pays taxes in shares

Kiniksa Pharmaceuticals International, plc chief strategy officer Eben Tessari exercised Restricted Share Units into common shares and had shares withheld for taxes.

Rhea-AI Filing Summary

Kiniksa Pharmaceuticals International, plc chief strategy officer Eben Tessari exercised Restricted Share Units into common shares and had shares withheld for taxes. On April 7, 2026, 2,726 RSUs were converted into 2,726 Class A Ordinary Shares. Of these, 846 shares at $48.94 per share were withheld to satisfy tax obligations, leaving Tessari with 23,130 Class A Ordinary Shares held directly. Each RSU represents a right to receive one Class A Ordinary Share and the RSU grant vests in four equal annual installments starting on April 7, 2023, over a four-year period.

Insider Trade Summary

2,726 shares exercised/converted

Exercise 3 txns

Insider Tessari Eben

Role CHIEF STRATEGY OFFICER

Type	Security	Shares	Price	Value
Exercise	Restricted Share Unit	2,726	$0.00	$0.00
Exercise	Class A Ordinary Share	2,726	$0.00	$0.00
Exercise Price or Tax Liability	Class A Ordinary Share	846	$48.94	$41K

Holdings After Transaction: Restricted Share Unit — 0 contracts (Direct); Class A Ordinary Share — 23,130 shares (Direct)

Footnotes (2)

1. F1. Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer.
2. F2. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, April 7, 2022.

Key Figures

RSUs exercised: 2,726 units Shares withheld for taxes: 846 shares Post-transaction holdings: 23,130 shares +2 more

5 metrics

RSUs exercised 2,726 units Restricted Share Units converted to Class A Ordinary Shares on April 7, 2026

Shares withheld for taxes 846 shares Class A Ordinary Shares withheld at $48.94 per share for tax obligations

Post-transaction holdings 23,130 shares Class A Ordinary Shares directly owned by Eben Tessari after transactions

Tax withholding price $48.94 per share Value applied to 846 withheld shares for tax liability

RSU vesting schedule 25% annually over 4 years From April 7, 2022 grant date, yearly anniversaries

Key Terms

Restricted Share Unit, Class A Ordinary Share, tax-withholding disposition, Exercise or conversion of derivative security, +1 more

5 terms

Restricted Share Unit financial

"Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share"

A restricted share unit (RSU) is a promise by a company to give an employee a set number of company shares at a future date, typically after meeting time or performance conditions. For investors, RSUs matter because when they convert into actual shares they increase the number of shares outstanding (like unlocking more tickets in a game), which can dilute existing holders, and they align employee incentives with company performance, influencing behavior and long-term value.

Class A Ordinary Share financial

"Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer"

A Class A ordinary share is a type of common stock a company issues that carries a specific set of rights—most often particular voting power, dividend terms, or transfer rules—distinct from other share classes. For investors it matters because those rights affect control over company decisions, how income is paid out, and how easy shares are to buy or sell; think of it like a tiered ticket that gives different access and influence at the same event.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security"

vest over a four-year period financial

"The RSUs vest over a four-year period, with 25% of the RSUs vesting"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Kiniksa (KNSA) report for Eben Tessari?

Kiniksa reported that chief strategy officer Eben Tessari exercised 2,726 Restricted Share Units into 2,726 Class A Ordinary Shares. In the same transaction, 846 of those shares were withheld to cover tax obligations, resulting in 23,130 Class A Ordinary Shares owned directly afterward.

How many Kiniksa (KNSA) shares does Eben Tessari hold after this Form 4?

After the reported transactions, Eben Tessari directly holds 23,130 Class A Ordinary Shares of Kiniksa. This reflects the 2,726 shares received from RSU conversion, reduced by 846 shares withheld to satisfy tax liabilities associated with the vesting and exercise of the Restricted Share Units.

What is the size of the RSU exercise reported for Kiniksa (KNSA)?

The filing shows the exercise of 2,726 Restricted Share Units, each converting into one Class A Ordinary Share. This RSU vesting and conversion increased Tessari’s share count before tax withholding, and represents one vesting tranche from a larger multi-year equity grant awarded earlier.

How were taxes handled in Eben Tessari’s Kiniksa (KNSA) RSU vesting?

Taxes were satisfied through a share withholding arrangement, not a market sale. Specifically, 846 Class A Ordinary Shares valued at $48.94 per share were disposed of as a tax-withholding transaction, reducing the net shares Tessari retained from the RSU conversion on that vesting date.

How do Tessari’s Kiniksa (KNSA) RSUs vest over time?

The Restricted Share Units vest over four years, with 25% of the RSUs vesting on each yearly anniversary of the April 7, 2022 grant date. Each vested RSU delivers one Class A Ordinary Share, subject to applicable tax withholding at the time the units convert into shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/08/2026 - 04:45 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tessari Eben

(Last) (First) (Middle)

C/O KINIKSA PHARMACEUTICALS INT'L

105 PICCADILLY, SECOND FLOOR

(Street)

LONDON W1J 7NJ

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
Kiniksa Pharmaceuticals International, plc [ KNSA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF STRATEGY OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/07/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Ordinary Share	04/07/2026		M		2,726	A	(1)	23,976	D
Class A Ordinary Share	04/07/2026		F		846	D	$48.94	23,130	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Unit	(1)	04/07/2026		M			2,726	(2)	(2)	Class A Ordinary Share	2,726	$0	0	D

Explanation of Responses:

1. Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer.

2. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, April 7, 2022.

	/s/ Douglas Barry, Attorney-in-Fact	04/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)